7th Grade Unit 3 Lesson 8 Investigating Rock Strata

What is relative dating?

• Determining the age of an object based on its location in the ground
• Determining the age of an object or event in relation to other objects or events
• Measuring the absolute age of an object

What is absolute dating?

• A method used to determine the exact age of a fossil or rock layer
• A method used to estimate the approximate age of a fossil or rock layer
• A technique for determining the color of a fossil or rock layer

Which statement best describes the law of superposition?

• The law of superposition states that rocks at the bottom are younger than rocks at the top.

• The law of superposition states that rocks at the top are older than rocks at the bottom.

• The youngest rocks are on top and the oldest are on the bottom.

Tags

NGSS.MS-ESS1-4

What statement best describes the law of lateral continuity?

• Layers of sediment initially extend vertically in all directions.
• Sediments are deposited in layers that extend horizontally in all directions until they reach an obstacle

  
  

• Layers of sediment initially extend in a circular pattern.

What is the principle of original horizontality?

• Layers of sediment are originally deposited horizontally under the action of gravity.

• Layers of sediment are originally deposited vertically under the action of gravity.
• Original horizontality refers to the concept that layers of sediment are randomly deposited.

Which statement best describes the law of cross-cutting relationships?

• Cross-cutting relationships have no impact on determining the age of geological features.

• Geological features are younger than the features they cut across.

• The law of cross-cutting relationships only applies to sedimentary rocks.

What is the law of fossil succession?

• Fossils found in rock layers are randomly arranged with no specific order
• The age of fossils in rock layers cannot be determined
• Fossils found in rock layers are arranged in a specific order, with the oldest fossils at the bottom and the youngest at the top.

Tags

NGSS.MS-ESS1-4

What is an index fossil?

• A fossil that is used to determine the age of rocks
• A fossil that is used to study the behavior of ancient animals
• A fossil that is used to define and identify a particular period of time